This is my first post :smile: , I would like to share with you all the things that I'm learning about ABAP every day and all that I have already learned.
Some advices, the best sources of information are SCN and HELP there is a lot of useful information
Some transactions to start working:
SE80 - ABAP Editor.
SE11 - ABAP Dictionary.
SE16 - Data browser, view/add table data.
SE24 - Class Builder.
SE38 - Program Editor.
SE39 - Split screen editor.
BAPI - BAPI Explorer.
SA38 - Execute SAP ABAP program.
SE51 - Screen Painter.
ST22 - ABAP runtime analysis ( ABAP Dump Analysis ).
SE84 - Repository info system.
SE93 - Maintain Transaction code.
SPRO - SAP System Customizing, IMG.
SQ01 - SAP Query development.
SO10 - Standard text editor.
SLIN - ABAP program extended syntax check.
Check this link for more transaction codes Useful SAP System Administration Transactions, Developer's Transaction Codes and Related to SAP Security.